Temperature controlled valve



June 11, 1935. J. PYMM TEMPERATURE CONTROLLED VALVE Filed Feb. 21

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INVENTOR JAM ES PYM M ATTORNEY Patented June 11, 1935 UNITED STATESFATE- N; V OFFICE-'j- .1 H i I I I TEMPERATURE CONTROLLED mm 7 JamesPymm, Brooklyn, N. a I "Application February 21, 1933, Serialnose-57,772; I v p 1' claim, "'(o1.15s-117'.1 V. This invention relatestosafety valves for' -controlling the flow of fluids in gas mains,ranges, radiators and water heaters, sprinkler heads, pipes and cut-offboxes on water mains or in any 5 other situationwhere it is desired tocontrol the flowof gas, water or other fluid upon the happening of someevent which changes the temperature in'the vicinity of the valve. v Theprincipal object of the invention is a simple and reliable device forautomatically controllin the-flow of. gases or liquids inaccordanc'ewith temperature changes. a 7. 3 Anotherobject ofz theinvention is an inexpen sive device of .the type referred to which maybemanufactured and sold as a unit and maybe attachedto existing mains,ranges and other ap pliances withoutaltering the construction of theappliance itself; 1 Another object of the invention is an im'proveddevice for regulating-the flow of gas to a burner andfor automaticallyshutting ofi the gas whe theflame is accidentally extinguishedw I shalldescribe the invention'in itsapplication to gas burners where itfunctions to shut off the gas when the flame is extinguished but as thedescription proceedsitwill be evident that the device may be usedequallywellin sprinkler heads; etc. :to turn on water or other fluid whenthejtemperature rises sharply due to fires or other causes.

Wherever gas isused for heating or lighting purposes there is danger ofgas escaping and causing-injury to health or death by asphyxiation, aswell as property damage from explosions. This sometimes results fromafiame being blown out,*ora gas cock beingturned on by a child, and issometimescaused by; failure of the gas supply which puts the flameout-and then allows the gas to escape without being ignited whenthesupplyisturned on again. In most communities, when the gas supplyfails,,it is customary to dee spatch messengersto warn housewives andother gas users to turn off all gas cocks before the supply is cut inagain. This entails considerable trouble and expense and does not alwaysprevent disaster when the occupants'of a house are out or asleep whenthe messenger calls. I

I avoid the above hazards and inconveniences by providing a simple andreliable control device which may be attached to any gas burner and isadaptedto control the flow of gas and to shut it off automatically whenthe flame is extinguished from any cause whateven' My deviceemploys anelement which is responsive 'tofchanges temperature and is arranged toactuateavalve valves are opened by a hand control I in order tomechanism.

main, pixie'fetc.

or-plurality of valves controlling the supply gas to-a'burner and issupplementary tothe usual hand control. The "heat-responsive element ispreferably" a flexible metal cone 'or bellows dia phrag'm which-expandswhen heated and contracts to normal size when cooled. Whenexpande'd-by-the heatof a burner'or pilot flame the diaphragm holds thegas valve or *valvesopen 5 and when the burner or pilot flame goes outthe diaphragm contracts and closes the valve or valves and-shuts off thenow of' gas'to the'bu'r'ne'r.

My invention is capable of various modifications and adaptations as"will appear from the followingfdes'cription.--- In some 'cases thediaphragm is heated directly by'the flame from the burner head and hencewill'be expanded only when the gasis lightedattheburnerhead; In suchcase the gas ignite the gas atthe' burner head and as soon'astheldiaphragm is expanded by the heat, which will bein'a few seconds,it' will hold the valves open until they are turned offby operation'ofthe hand control or by automatic contraction of the diaphragm if theflame is accidentally extin' guished; 'If-the'gas'is turned on by handwithout being ignited at-"the burner headgas may sometimes bejdone by a;child or accidentally by a-housewife, the diaphragm will not-be heatedand it will therefore close the valves the'instant the hand control isreleased. This device may be used with one 'o'rmore valves; dependingupon the situation inwhich it is usedg a plurality of valvesincreasingfth'e' safety factor by shutting ofithe'g-as at two or moredifferent points. The above and. other-"features and advantag'es of theinvention will-be described in connection with' the accompanyingdrawing, which:

Fig; 1 is "a longitudinal? section through a gas burner embodying theinvention;-

Fig} 2 is a plan view with parts of the shank broken away-"to show theinterior;

ing showing the single control knob; and

Fig, l'is' a detail view of the'valve actuating 1 For; purposesofillustration the burner is mountedin 'a' gas range having top plate Iand front plate '2 containinggas'maint although it may be used'inanyother kind of gas appliance,

The burner itself may be of any suitable construction such as thefwellknown type having burner head 4, shank 5 and butterflyvalve 6 disposedin a pass'age in valve chamber or 'pipe I which connects the'shank togas main 3.

, The inner end of pipe I is provided with a needle or plunger valvecomprising valve seat 8 formed in the pipe and cooperating plunger 9which is adapted to slide in a guide frame I secured to pipe 'I as byscrews I2.

Valve plunger 9 is mounted on one end of rod I3 which extends lengthwisethrough'shank 5. The other end of this rod is secured to inner end I4 ofa movable frame I5 disposed in casing I6 which is connected to shank .5bythreaded bushing I I. iCasingdfi is-open at theitop to receive heatthrough the central opening in burner head l. Coil spring I8 surroundsrod I3 pressed between plunger 9 andbushing I'I.

Stationary bar I9 extendsithroii'gh.iffrairie '15 and is secured to thewall of easing suitable manner. Frame tight metal cone orbellowsigdiaphragmyzfl Loon; taining ether or any other suitable, gas[.Which will cause the diaphragm to expand like an accordion .whenheated and toecontractato :normal size .-when--co0led-. O ne faceofdiaphragmflfl is at ached t t eut enc m vab e-frame: 5 whilethelother face is lsecureds -to stationary bar 9-. When di h m 0 ris onet lun er 9,is seated in-valve seat}! and hen ce;gas-cannot enter shank5. When diaphragm, expands, due

I to heating it. exerts ..pr,e ssur;e. on zbar I9 :antl on the out ledef ramed ;and,-..s n b t tiener th xpa d n diap ra m moves frame I5 utardl o the limi n XPend drO t n sh wini -i -q Movement o :f.ram -.l;5causes azcorre pond n v ment f p un er-gun lwhieh'visaseeu ed to theinner end offrame li 'Hencelmovement of iran e I5- and plunger-rod .I;3,glue :to expansion of iaph a m .20, :eaus szp uneer :3 at i-meve q land?i Wh h-pos t nirgas wi l .r e i nt shank 5inasmuch as ibutterfly valve 6is also opened at the s me time s r na te d cr b Wh di h a m?" c tra tzit tz eturnsgimm .1 red 13 and p un e to h si ie s wnin-fu ines nFiland-. hus los n l'th plun rp -ated-valve. "The automatic-operation of-.these parts -yvill beclescrib,ed later. i 'T. w

; Butterfly'valve :6 'andplunger valve 9: are=oper+ atedbypontrol rod 21which slides in a longitudinal' direction. Theouter .end of this rodcarries n a tuat n -112m Hand a: se es o ra eh t teeth .2 adapted .t e athe ed coi sl t kwhiehfo ed in-z ent p a e" 2 5 i h 5" ;I e-., flw'heinn r end o r d t2 l jspiv elly co nected by p nazfi to pivot ;Z-6 thecenter of which is secured to Qferm .2 i i ot d b p n .28 to zthe o e eof an elongated "track or sleeve .-29 as shown; fin Figs.- 1 andigValveplunger :Scarries elbow-530 which slides in sleeve 29.'Hencelongitudinal movement of control rod Z} turns pivot'tarmg 26 whichrotates; :pivot pinfz'l-y-and butterfly Ii .and also moves sleeve Mina-direction opposite; to that of control rod 2|. 'When the partsare inthe position shown in Figs. 1, 2 and 4 butterfly valve 6 andwplungervalve. 9 are both closed and henceathegas is shut ofi, Now,-in order tolight the gas knob -,-2 2-.is

is d-a d n gs and 4 r ered= to the left as viewed in Fig. .1}. todisengage ratchet 23 from the edge of slot 24 and is then;pulled' outany desired distance depending upontheilow of gas required. -When thegas has beenIignited ratchet 23- is again moved into'engagement with theedge of slot 24 to hold controlrod 2, I irradjusted position. Whencontrol eg-21,1 pulled and is corn -16 in-enr I5 contains a thin -gastgfl intmth do t d-lin posit on shownrinii'i'ss.

out in this manner it turns pivot arm 26 which rotates pivot pin 2'! andthereby turns butterfly 6 to the open position shown in dotted lines inFig. 1. Pivot arm 26 also pushes sleeve 29 back toward the burner head,carrying with it elbow 30 and thereby moving plunger 9 oil valve seat 8.Gas now flows from main 3 through pipe I, butterfly valve 6, plungervalve seat 8 and shank 5 to burner head 4 where it is ignited in theusual m I ifThe. heat. i mm ft sane; mp ne .5 soi phragm casing I6. andheats up diaphragm 20 which moves to the expanded position in Fig. 1

-..'*liol"ds thrn inlsuchiposition as long as the gas is rhurningpv Ifthe gas is accidently extinguished from any cause whatever, diaphragm 20will quickly coolrandxcontract therebymeturnin'gzfrafiie Ia'itorits'.original .epositio'n':iandsretuiningplunger rod 4:3, *pl'u'ngerifl and:elbow-330' to zthe'apo'sitio'ri shown in full;lines;"inzFig.a1.;;,Plunger: sr-thus re' -i turn'svtowalve seat :8 andtherebyzshuts'iofi'zthe flowgofi gasatathis point; l At: the'zsame timeelbow 30: slides :int'oz-sleeve 1:29 "and; awheniit reaches the end ofsaid sleeve, elbowi30 carries thei's'leeve with it and:therebyjrrotatesipivotl arin zfiiinl a i direction to;1close::butterfiy. ;6 "ith'us': shutting oifcthe ffiow 'of gas: at:this'; point. Such f'rotationi1of :pivot arm 26 also draws control rod.2 lieback toith'efio'fi" position? shown dn afull linesiin oFi'gs. 1 2and 2, ratchet :te'eth (233 izbeing rztapered T a direction suchzthat:they will name the iedge' of slot 20 whena controhrodflrltiszpulledtoward the burner hadzbutidwill flock the rodiseburely again"aiiy force or accidental jars tending to m'o'vefiit' tdian ffopeni inositio'n away from itlre ibu'rner head.

.Ehe' flame".;may umourse be extin'gu-ished "by grasping knob .22andipushing control 'rod Z I 'back toward shanlriiito the tlimitingfolosed positioii .sh'own linafull dines 'lin JEigs thereby butterfly:16, '.='shutting;;oif the" flow of ga's' at. thiswith'anQordiIibLifyQpilot light; operating a'sf'd es'cribeid" ave. whenthe-usual button is pushed to ignitel-lthj pilotjlame. Manychangesinaybe made in the details o f .eonsftruc'tio'n and. method or.operation described above "without i e ihtfSQQbQ-flfid s iritiof,theinvention asQdefinedinthe appended The nvention claimed is FIfheembine ienwi h;a sburne i a al qchamber: containing apassage-connecting said burner to a gas-main, a rotatable valve in saidchamber-operable to regulate-the flow of gas throughsaiipassagera-shut-ofi valve in-fsaid-rzpas sage, a bellows typethermostat positioned in heating relation to said burner, a frame aboutsaid thermostat and connected to move therewith, a rod connecting saidmovable frame and said shutoff valve, a spring surrounding said rodtending to maintain said shut-off valve closed by tension thereagainstwhen said thermostat is contracted, means operatively interconnectingsaid valves and operable to rotate said first mentioned valve and toopen said shut-off valve against the tension of said spring andcontracted thermostat, a

manually operable extension on said interconnecting means for manuallyholding said plunger valve open until said thermostat is expanded byheat from said burner, ratchet means on said extension to hold saidrotatable valve ina selected open position while said shut-off valve isopened, and means responsive to the closing of said shut-off valveoperable to disengage said ratchet and to close said rotatable valve.

JAMES PYMM.

